Method of producing pavements.



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METHOD OF PRODUCING PAVEMENTS.

Specification of Letters Patent.

Patented Dec. 25, 1906.

Appliczition filed September 20, 1906. Serial No. 335.483.

To all wh-ont it 71mg winccrib:

Be it known that I, HERMAN J. RUFLI, a citizen of the United States of America, residing at Mobile, in the county of Mobile and State of Alabama, have invented certain new and useful Improvements in Methods of Producing Pavementgof which the following is a specification.

This invention relates to paving, in particular to a composition and the method of producing and applying the said composition.

One of the novel ideas forming the basis of this invention consists in the use of the excavated material-whether it be simplyl swamp, black prairie, or bottom lands, loam, clay, gravel, waxy-gumbo soil, sand, or natural formation --as a basis of the ingredients of the composition, doing away with the use of costly preparations and hauling of material in the producing of a road-bed, thus enabling an operator to' remove the soil or materia forming the bed of ordinary roads and by simply drying and heating the said material to 300 Fahrenheit and adding to it certain ingredients, to be hereinafter'specified, relaying the said material in the excavation, and forming thereby a foundation and surface of unusual stability and rigidity.

The further object of the invention is to produce a pavement which would be sani tary, in that the material now forming city and country roads would be removed and sterilized through the drying and heating process to such a degree as to destroy all disease germs which are usually present inthe dust and dirt of such roads permeated by vegetable and organic matter.

As the great advantage of this invention resides in the use of the excavated material as a base for the pavement to be laid, it follows that the expense of producing this pavement is minimized, since no hauling of the basic material is required, and it is not necessary to purchase sand, gravel, or speciallyprepared ingredients.

The process of making this pavement is, broadly, as follows: The soil is first excavated from the roadway or street where the pavement is to be laid. Then it'is thoroughly mixed with pitch and other ingredients, to be hereinafter specified, and the resulting prodnot is laid in the excavation and rolled, as is customary in making similar pavement. By the term pitch is meant, preferably, the pitch of coal-tar.

The process more in detail is as follows: The soil is first excavated from the roadway or street where thcpavement is to be laid. In the second place,'it is dried by raising the temperature to 150 Fahrenhe t.- combincd with a disinfecting compound consisting of eight per cent. naphthalene, seven per cent. abietitc, andfivc per cent. paracrcosol, and the temperature is furthe raised to 300 Fahrenheit until completely steril- .ized. This heating may be done as a continued process of dryingthat is, the earth is subjected to heat for drying same, and while it is thus heated the disinfectants may be combined with the soil in the desired proportions and thoroughly mixed therewith While this would be the shortest way of doing the work, still if the soil had been dried and bccomcxcool it could subsequently be heated and the ingredients combined Withit. The only object of this part of the process is; to cause thorough mixing.

While I have referred to pitch or like material as a binding agent, I prefer after the soil has been sterilized and disinfected to use a cement or binding agent which would coinpris c the following ingredients in approximately the proportion stated, viz: utilizing sixty per cent. of carbon-pitch, five per cent. anthracene-oil, fifteen per cent. of dead oil of coal-tar, ten-per cent. maltha, and ten per cent pine-tar. The binding agent thus produced is utilized and. compounded with the soil in the proportion of seventy-eight partsof soil to twe-nty-t wo parts of the cement or binding agent. a

The amount of disinfectant used varies with the conditions, but may be from one to ten pounds to one hundred pounds of the earth and binder.

The road-bed is compressed by a roller to plied thereto being rolled to leave corrugations between each layer. The top layer will then be rolled until a smooth even surface is produced, whereby traction is ob tained with the least ell'ort.

It will be found that the disinfectants readily combine with the earth and binder without affecting the action of the binder. ing ingredients are selected for the reason that they dry quickly and produce an effec ceptibly by heat and cold after they are mixed with the earth.

Having fully described my invention, what The soil is similar to asphalt without being affected per-' produce a compact foundation, the mass ap- TOP The bindtar and replacing the material to 300 Fahrenheit adding thereto a binding 1 'material consisting of carbon-pitch, anthracene-oil, dead oil of coal-tar, maltha and pine- 1 in the excavation.

2. The method of producing pavement consisting of excavating a road-bed, drying and heating the material thus excavated and applying thereto a disinfectant consisting of eight per cent. naphthalene, seven per cent. 'abietite and five per cent. para-creosol and raisin the temperature of the material to 300 ahrenheit adding thereto a binding material consisting of carbon-pitch, ant-hramaltha and I cene-oil, dead oil of coal-tar, pine-tar and replacing the material thus produced in the excavation.

3. The method of producing pavement g consisting of excavating a road-bed, drying 1 and heating the material thus exc avated and i applying thereto a disinfectant consisting of naphthalene, abietite and para-creosol and} I disinfectant consisting of g abietite and para-creosol 3 thus produced l a pitch,

raising the temperature of the material to 300 Fahrenheit adding thereto a binding material consisting df sixty per cent. carbonpitch, five per cent. anthraeene-oil, fifteen er cent. dead oil of coal-tar, ten per cent.- maltha, and ten per cent. pine-tar, and replacing the material thus produced in the excavation.

4. The method of producing pavement 1 consisting of excavating a road-bed, drying and heating the material thus excavated and applying thereto adisinfectant consisting of eight per cent. naphthalene,- seven per cent. abietite and five per cent. para-creosol and raising the temperature of the material to 300 Fahrenheit. adding thereto a binding material consisting of sixty per cent. carbonfive per cent. anthracene-oil, fifteen per cent. dead oil of coal-tar, ten per cent. maltha, and ten per cent. pine-tar, and replacing the material thus produced in the excavation'.'- t i In testimony whereof I aliix my signature, in the presence of two witnesses, this 17th day of beptember, 1906.

HERMAN J. RUrLi.

Witnesses: AXDREW SrnAUss, G120. J: SULLIVAN. 

